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Al can wash a car in 60 minutes, and bill can wash a car in 30 minutes. cathy can wash a car in 20 minutes. how long, in minutes, would it take the 3 of them to wash a car, working together?

a. 10

b. 36

c.

d. 110

User Ivana
by
8.0k points

2 Answers

6 votes

Answer:

B

Explanation:

36

User Tbt
by
8.5k points
3 votes
B) 36

To figure this out you need to average the numbers. To average them you add them all up and divide by how many are there.
(60+30+20)/3
(90+20)/3
110/3
36
User Tobias Koller
by
7.6k points

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